Answer:
Beginning the age of European exploration
Explanation:
Answer:
The purpose of this lab is to observe how heat flows through conduction, convection, and radiation.
Explanation:
In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing. However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope. Most of what researchers know about chromosomes was learned by observing chromosomes during cell division.
Plant cells have all of these, but only a plant cell has a chloroplast.
